-2a+10=-20

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Solution for -2a+10=-20 equation: 



-2a+10=-20

We move all terms to the left:

-2a+10-(-20)=0

We add all the numbers together, and all the variables

-2a+30=0

We move all terms containing a to the left, all other terms to the right

-2a=-30

a=-30/-2

a=+15

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